new: locale implementation and signal handler

locale/tr/LC_MESSAGES/pooler.po

@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2024-07-31 23:21+0300\n"
+"POT-Creation-Date: 2024-08-01 01:59+0300\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -72,56 +72,69 @@ msgstr ""
 msgid "Please answer with y/n"
 msgstr ""
 
-#: src/main.c:74
+#: src/main.c:48
+msgid "Received a segfault"
+msgstr ""
+
+#: src/main.c:93
 msgid "Failed to access the root directory, are you running as root?"
 msgstr ""
 
-#: src/main.c:76
+#: src/main.c:95
 #, fuzzy, c-format
 msgid "Bad root directory (%s): %s"
 msgstr "Havuz dizini kullanmak başarısız oldu: %s"
 
-#: src/main.c:84
+#: src/main.c:103
 #, c-format
 msgid "Bad datadir (%s): %s"
 msgstr ""
 
-#: src/main.c:89
+#: src/main.c:108
 #, c-format
 msgid "Bad tmpdir (%s): %s"
 msgstr ""
 
-#: src/main.c:96
+#: src/main.c:115
 #, fuzzy
 msgid "Failed to add pool "
 msgstr "Havuzları sekronize etmek başarısız oldu: %s"
 
-#: src/main.c:109
+#: src/main.c:127
+msgid "Failed to lock, matt is already running"
+msgstr ""
+
+#: src/main.c:131
+#, fuzzy
+msgid "Failed to lock, are you root?"
+msgstr "Havuzları sekronize etmek başarısız oldu: %s"
+
+#: src/main.c:142
 msgid "Command not found: "
 msgstr ""
 
-#: src/main.c:111
+#: src/main.c:144
 #, c-format
 msgid "MatterLinux package manager (version %s)"
 msgstr ""
 
-#: src/main.c:112
+#: src/main.c:145
 msgid "Usage: "
 msgstr ""
 
-#: src/main.c:114
+#: src/main.c:147
 msgid "Here is a list of available commands:"
 msgstr ""
 
-#: src/main.c:120
+#: src/main.c:153
 msgid "To list different options, use commands with "
 msgstr ""
 
-#: src/main.c:121
+#: src/main.c:154
 msgid "Here is a list of available global options:"
 msgstr ""
 
-#: src/main.c:124 src/main.c:125 src/cmd/info.c:42 src/cmd/info.c:43
+#: src/main.c:157 src/main.c:158 src/cmd/info.c:42 src/cmd/info.c:43
 #: src/cmd/info.c:44 src/cmd/install.c:25 src/cmd/install.c:26
 #: src/cmd/list.c:13 src/cmd/list.c:14 src/cmd/remove.c:20 src/cmd/remove.c:21
 #: src/cmd/update.c:29
@@ -129,7 +142,7 @@ msgstr ""
 msgid "    "
 msgstr ""
 
-#: src/main.c:127
+#: src/main.c:160
 msgid ""
 "Licensed under GPLv3, see https://www.gnu.org/licenses/ for more information"
 msgstr ""

src/lock.c

@@ -0,0 +1,28 @@
+#include "lock.h"
+#include <fcntl.h>
+#include <libmp/util.h>
+#include <string.h>
+#include <unistd.h>
+
+lock_st lock(lm_ctx_t *ctx) {
+  if (NULL == ctx->data)
+    return LOCK_ERROR;
+
+  char lock_file[strlen(ctx->data) + 10];
+  join(lock_file, ctx->data, "lock");
+
+  if (exists(lock_file))
+    return ALREADY_LOCKED;
+  if (creat(lock_file, 0600) == -1)
+    return LOCK_ERROR;
+  return LOCK_SUCCESS;
+}
+
+void unlock(lm_ctx_t *ctx) {
+  if (NULL == ctx->data)
+    return;
+
+  char lock_file[strlen(ctx->data) + 10];
+  join(lock_file, ctx->data, "lock");
+  unlink(lock_file);
+}

src/lock.h

@@ -0,0 +1,11 @@
+#pragma once
+#include <libmp/all.h>
+
+typedef enum lock_state {
+  ALREADY_LOCKED = 1,
+  LOCK_SUCCESS   = 2,
+  LOCK_ERROR     = 3,
+} lock_st;
+
+lock_st lock(lm_ctx_t *ctx);
+void    unlock(lm_ctx_t *ctx);

src/main.c

@@ -26,6 +26,8 @@
 #include <libmp/ctx.h>
 #include <libmp/error.h>
 #include <libmp/util.h>
+#include <locale.h>
+#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 
@@ -33,10 +35,28 @@
 #include "cmd.h"
 #include "config.h"
 #include "intl.h"
+#include "lock.h"
 #include "log.h"
 #include "util.h"
 
+lm_ctx_t ctx;
+
+void handler(int sig) {
+  unlock(&ctx);
+  printf("\e[?25h\n");
+  if (SIGSEGV == sig)
+    error(_("Received a segfault"));
+  exit(1);
+}
+
 int main(int argc, char *argv[], char *envp[]) {
+  signal(SIGSEGV, handler);
+  signal(SIGINT, handler);
+
+  setbuf(stdout, NULL);
+  setlocale(LC_ALL, "");
+  textdomain("matt");
+
   cmd_t commands[] = {
       {.name = "info",    .desc = "show information about a single package", .func = cmd_info   },
       {.name = "list",    .desc = "list all the installed packages",         .func = cmd_list   },
@@ -51,7 +71,6 @@ int main(int argc, char *argv[], char *envp[]) {
   args_t  *args = NULL;
   bool     ret  = false;
   config_t config;
-  lm_ctx_t ctx;
 
   set_env(envp);
   lm_ctx_init(&ctx);
@@ -100,11 +119,25 @@ int main(int argc, char *argv[], char *envp[]) {
   }
 
   for (int i = 0; i < sizeof(commands) / sizeof(cmd_t); i++) {
-    if (eq(commands[i].name, args->list[0].value)) {
+    if (!eq(commands[i].name, args->list[0].value))
+      continue;
+
+    switch (lock(&ctx)) {
+    case ALREADY_LOCKED:
+      error(_("Failed to lock, matt is already running"));
+      goto end;
+
+    case LOCK_ERROR:
+      error(_("Failed to lock, are you root?"));
+      goto end;
+
+    default:
+      break;
+    }
+
     ret = commands[i].func(&ctx, &config, args);
     goto end;
   }
-  }
 
   error(_("Command not found: " FG_BOLD "%s"), args->list[0].value);
 help:
@@ -130,6 +163,8 @@ help:
   goto end;
 
 end:
+  unlock(&ctx);
+
   free(full_datadir);
   free(full_tmpdir);